On 1/3/2012 1:40 PM, Eric Noulard wrote:
I have been giving wrong advice about the usage of CMAKE_FIND_ROOT_PATH which seems to be "reserved" for cross-compiling whereas
Correct.
CMAKE_PREFIX_PATH CMAKE_INCLUDE_PATH CMAKE_PROGRAM_PATH CMAKE_LIBRARY_PATH CMAKE_IGNORE_PATH are meant to be used in the general case.
Correct.
Could someone enlighten me about the intended usage and relationship between those vars and their "SYSTEM" counterpart CMAKE_SYSTEM_*_PATH ?
The SYSTEM_ ones are provided by CMake and are searched later than the others.
And may be why do we need CMAKE_FIND_ROOT_PATH for cross-compiling if CMAKE_PREFIX_PATH already existed?
CMAKE_FIND_ROOT_PATH reroots all paths regardless of where they came from (evauation of the other variables, arguments to the find_* commands, etc.). Variables like CMAKE_PREFIX_PATH just add more paths. Their values do not need to know about the cross-compiling toolchain root so they can just use "/bin".
CMAKE_*_PATH are documented (through --help-variables) whereas CMAKE_FIND_ROOT_PATH doesn't seem to be currently.
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